Fireangel FireAngel Optical Smoke Alarm with 5 Year Replaceable Batteries, FA6615-R-T2 (ST-625 replacement, new gen) - Twin Pack & FA3820 10 Year Sealed Battery Alarm Carbon Monoxide, Clear

Product 1: The perfect replacement for FireAngel ST-625 models with a simple swap of the baseplates, or for ST-622, ST-620 and ST-750 models using the existing baseplate

Product 1: With optical sensing technology smoke is rapidly detected as it enters the alarm chamber, for a quick reaction to slow burning fires

Product 1: The alarms are supplied with 4 x AA batteries which can be replaced upon hearing the low battery warning, it is recommended you replace the alarms after 10 years

Product 1: Featuring a quiet test function which means you're less likely to wake up loved ones or disturb the neighbours when testing your alarms

Product 2: Advanced electrochemical sensor detects dangerous levels of Carbon Monoxide ( CO ) in your home and alerts you with a clear, loud alarm

Product 2: As well as being calibrated and rigorously tested in-house the alarm has been third party approved through the British Standards Institute (BSI) and is Kitemark certified

Product 2: The unit has been designed to either be wall mounted or left portable so you can take it on holiday for protection on the go. It's also suitable for caravans, motor caravans and boats

Product 2: The device offers maximum protection for homes & rented properties as it is supplied with a sealed, tamper-proof battery which will last the lifetime of the alarm